Method for preparing high-visible light activity nitrogen doped N-TiO2

A technology of visible light and active nitrogen, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of expensive electron beam irradiation equipment and limited development, achieve high visible light catalytic activity, reduce Excellent production cost and catalytic activity

Inactive Publication Date: 2018-01-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent CN 104128197B discloses a method for preparing nitrogen-doped titanium dioxide photocatalyst by electron beam irradiation, but the electron beam irradiation equipment required by this technology is expensive, which limits the development of this technology to a certain extent

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  • Method for preparing high-visible light activity nitrogen doped N-TiO2
  • Method for preparing high-visible light activity nitrogen doped N-TiO2
  • Method for preparing high-visible light activity nitrogen doped N-TiO2

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Embodiment 1

[0030] Such as figure 1 Shown, the nitrogen-doped N-TiO of the present embodiment 2 The preparation process comprises the following steps: measure 60mL of a mixed solution of isopropanol and acetylacetone at a volume ratio of 1:1 with a graduated cylinder and place it in a dry beaker, then measure 3mL of nitric acid with a mass fraction of 68% and dropwise into The above mixed solution of isopropanol and acetylacetone was stirred for 15 min to obtain solution A. While stirring, 6 mL of butyl titanate was added dropwise to solution A at a titration rate of 5 mL / min with a pipette gun, and stirring was continued for 15 min to obtain a reaction precursor. Transfer the reaction precursor to the reaction kettle, add absolute ethanol to make the filling degree 70%; seal the reactants, put the reaction kettle in an oven at 180° C., and react for 18 hours. After cooling, the product was centrifugally washed with deionized water until neutral, and dried in an oven at 80 °C to obtain ...

Embodiment 2

[0038] Use a graduated cylinder to measure 50 mL of a mixed solution of isopropanol and acetylacetone at a volume ratio of 1:1 and place it in a dry beaker, then use a pipette to measure 1.5 mL of nitric acid with a mass fraction of 68% and add it dropwise to the above-mentioned isopropanol and acetylacetone. The mixed solution of acetone was stirred for 10 min to obtain solution A. While stirring, add 4 mL of butyl titanate dropwise to solution A at a titration rate of 5 mL / min with a pipette gun, and continue stirring for 15 min to obtain a reaction precursor. Transfer the reaction precursor to the reaction kettle, add absolute ethanol to make the filling degree 80%; seal the reactant, put the reaction kettle in an oven at 160° C., and react for 16 hours. After cooling, the product was centrifugally washed with deionized water until neutral, and dried in an oven at 80 °C to obtain nitrogen-doped N-TiO 2 .

[0039] figure 2 It also shows that the nitrogen-doped N-TiO prep...

Embodiment 3

[0042] Measure 55mL of the mixed solution of isopropanol and acetylacetone with a volume ratio of 1:1 with a graduated cylinder and place it in a dry beaker, then use a pipette to measure 2mL of nitric acid with a mass fraction of 68% and add it dropwise to the above isopropanol and acetylacetone The mixed solution was stirred for 10 min to obtain solution A. While stirring, 5 mL of butyl titanate was added dropwise to solution A at a titration rate of 5 mL / min with a pipette gun, and the stirring was continued for 15 min to obtain a reaction precursor. Transfer the reaction precursor to the reaction kettle, add absolute ethanol to make the filling degree 80%; seal the reactant, put the reaction kettle in an oven at 160° C., and react for 16 hours. After cooling, the product was centrifugally washed with deionized water until neutral, and dried in an oven at 80°C to obtain nitrogen-doped N-TiO 2 .

[0043] figure 2 It also shows that the nitrogen-doped N-TiO prepared in th...

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Abstract

The invention discloses a method for preparing high-visible light activity nitrogen doped N-TiO2. The method comprises the following steps: mixing mixed solutions of isopropanol and acetylacetone, adding nitric acid, and stirring so as to obtain a solution A; under a stirring condition, dropping butyl titanate into the solution A, further continuously stirring uniformly so as to obtain a reactionprecursor; transferring the reaction precursor into a reaction kettle, adding absolute ethyl alcohol, and sealing the reaction kettle; controlling the temperature inside the reaction kettle to 140-200DEG C, and performing a reaction for 14-20 hours; cooling to the room temperature, washing a product to be neutral, and drying, thereby obtaining the nitrogen doped N-TiO2. The method disclosed by the invention is simple and easy to operate, the energy can be saved, and a sample has high visible light activity.

Description

technical field [0001] The present invention relates to nitrogen-doped N-TiO 2 The preparation method, especially relates to a highly visible light active nitrogen-doped N‐TiO 2 method of preparation. Background technique [0002] The development of production and the progress of industry have made the environmental pollution more and more serious, and the energy crisis has become more and more obvious. The control and treatment of environmental pollution and the regeneration and utilization of energy are major problems facing human society that need to be solved urgently. Among many environmental pollution control technologies, TiO 2 The representative semiconductor photocatalyst is an ideal environmental cleaning material. TiO 2 Because of its unique physical and chemical properties: chemical stability, low price, non-toxic and harmless, etc., it is widely used in wastewater treatment, photolysis of water to produce hydrogen and other fields. Currently TiO 2 The deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 陈志武董国艳卢振亚
Owner SOUTH CHINA UNIV OF TECH
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